Screw slotting apparatus



May 13, 1941. H. c. GoLz 2,241,45

SCREW SLOTTING APPARATUS Filed Jan. 1l, 1940 WVM/raf? Y h. C. Gazz Patented May 13, 1941 2,241,456 SCREW sLoT'rlNG APPARATUS Harold C. Golz, Chicago, Ill., assignor to Western Electric Company, Incorporated, N. Y., a corporation of New York New York,

Application January 11, 1940, Serial No. 313,328

2 Claims.

This invention relates to screw slotting apparatus and more particularly to a saw cleaning attachment Afr screw slotting saws.

Quite frequently, in the manufacture of screws, the heads of the screws are damaged during their slotting by chips cut from previously slotted screws accumulating in the teeth of the slotting saw.

It is an object of the present invention to provide a means for preventing the accumulation of chips or burrs in saws.

In accordance with one embodiment of the invention, a screw slotting saw mounted in a rocker head of a slotting machine is provided with chip removing spring mounted on the rocker head and engaging the saw during the slotting of screw heads to remove chips from the teeth of the saw and prevent them from accumulating on the teeth to such an extent as to damage the head of the screw.

A better understanding of the invention may the groove 33 being adapted to receive the belt be had by reference to the following description of one embodiment thereof, when considered in connection with the accompanying drawing, wherein f Fig. 1 is a side elevationalview of the rocker head and the saw supported by it in a screw head slotting machine;

Fig. 2 is a plan View of the apparatus shown in Fig. 1, parts being broken away to more clearly illustrate certain details thereof;

Fig. 3 is a side elevational view on an enlarged scale of certain details of the apparatus shown in Fig, 1; and

Fig. 4 is a vertical sectional view of the apparatus shown in Fig. 3 showing the relation of the saw and chip removing spring.

Referring to the drawing, wherein like reference characters designate similar parts throughout the several views, the numeral 5 designates a support post on which a rocker head 6 of a screw slotting machine is pivoted. The rocker head Ii is hollow and comprises a back wall 1, a curved top wall 8 and a. front wall 9, which enclose a circular saw I0 and cooperating parts adapted to cut a slot in the head of. a screw I8, shown in dot and dash lines. A shaft II is journalled in a boss I2 formed on the back wall 1 and is fixed in place by a nut I3 threaded on a reduced end I4 thereof, a washer I5 being interposed between the nut I3 and the rear surface of the boss I2 and the nut being prevented from rotation with respect to the shaft II by a pin I6 passed through the nut I3 and shaft II.

The forward end (lower in Fig, 2) of the shaft II has a pulley 20 xed to it by means of a pin 2l. The saw I0 is mounted on the shaft II and secured thereto by a nut 22 threaded onto a reduced end 2li of the shaft and clamping the 30 and the groove 32 being adapted to receive a belt 34 driven from a power source (not shown). The pulley 3| is freely rotatable about a. supporting shaft 35 mounted in the support post 5, which shaft 35 also supports the rocker head 6 for oscillation about it. Formed on the rocker head 6 are a pair of bosses 40 and 4I, which serve as bearings for the head 6 in its oscillation about the shaft 35, which has a nut 42 on its extending end to hold the rocker head 5 on the shaft.

'Ihe underside of the rockgr head 6 is provided with a plate 43, which serves as a brace between the front wall 9 and back wall I of the rocker head and supports a relatively thin leaf spring 45, which is secured to the plate 43 by screws 48-48 and resiliently engages the toothed edge of the saw I0. When the spring is initially attached to the plate 43, the spring engages only the tips of the teeth'in the saw I 0. However, after the apparatus has been equipped with the spring 45 for some time, a slot 46 will be cut in the spring 45 by the saw I 0 and then the edge `4I of the slot will engage the tips of the l teeth and the sides of the slot will engage the sides of the saw I0 to remove any chips or burrs which may have caught on the teeth of the saw I I).

While the invention has been described as applied to a specific type of screw slotting apparatus, it is subject to many modifications and is to be limited only by the scope of the appended claims.

What is claimed is:

1. In a screw slotting apparatus, a circular saw, a support for said saw, and a leaf spring xed to the support in a position at a tangent to the periphery of the saw and bearing against the teeth of the saw in the general area where the teeth of the saw are pointed downwardly, said spring being so positioned as to be cut by the saw and the slot formed in the spring having its edges adjacent the sides of the saw.

2. In a screw slotting apparatus, a circular saw, a support for said saw, and a leaf spring xed to the support in a position at a tangent to the periphery of the saw and bearing against the teeth of the saw, at a point on the periphery of the saw adjacent and ahead of the point where the saw engages the screw head.

HAROLD C. GOLZ, 

